A1005 Spell It Right

#include<iostream>
#include<vector>
#include<queue>
#include<stack>
#include<string>
#include<math.h>
#include<algorithm>
#include<map>
#include<cstring>
#include<set>
using namespace std;
string a[10] = { "zero","one","two","three","four","five","six","seven","eight","nine" };
int main()
{
	string s; cin >> s;
	int sum = 0;
	for (int i = 0; i < s.length(); i++)
	{
		sum += (s[i] - '0');
	}
	string b= to_string(sum);
	for (int i = 0; i < b.size(); i++)
	{
		cout << a[b[i] - '0'];
		if (i < b.size() - 1)
		{
			cout << " ";
		}
	}
}